Welcome to the Spotify Community.
If you open Facebook on desktop and head to Settings > Apps > Spotify, is 'Friend List' ticked?
If it is, we suggest you to get in touch with them from any of our social media help sites: @SpotifyCares on Twitter and Spotify Cares on Facebook. Just send them a private message with your account's email address and username.
Don't hesitate to drop us a message if you need us again.